<template>
  <div class="login_container">
    <div class="login_box">
      <!--头像区-->
      <div class="avatar_box">
        <img
          src="../assets/Miwaitan.jpg"
          alt="头像"
        >
      </div>
      <!--登录表单区域-->
      <el-form
        label-width="0px"
        class="login_form"
        :model="loginForm"
        :rules="loginFormRules"
        ref="loginFormRef"
      >
        <!--用户名-->
        <el-form-item prop="username">
          <el-input
            prefix-icon="el-icon-s-custom"
            v-model="loginForm.username"
          ></el-input>
        </el-form-item>
        <!--密码-->
        <el-form-item prop="password">
          <el-input
            prefix-icon="el-icon-key"
            v-model="loginForm.password"
            type="password"
          ></el-input>
        </el-form-item>
        <!--按钮区域-->
        <el-form-item class="btns">
          <el-button type="primary" @click="login">登录</el-button>
          <el-button type="info" @click="resetLoginForm">重置</el-button>
        </el-form-item>
      </el-form>
    </div>
  </div>
</template>

<script>
export default {
  data() {
    return {
      //登录表单的登录数据
      loginForm: {
        username: "admin",
        password: "123456",
      },
      loginFormRules:{
          //验证用户名是否合法
          username: [
              { required: true, message: '请输入用户名', trigger: 'blur' },
              { min: 3, max: 10, message: '长度在3到10个字符', trigger: 'blur' }
          ],
           //验证密码是否合法
          password: [
              { required: true, message: '请输入密码', trigger: 'blur' },
              { min: 6, max: 15, message: '长度在6到15个字符', trigger: 'blur' }
          ],
      },
    };
  },
  methods: {
      //点击重置按钮,重置登录表单
      resetLoginForm(){
        //   console.log(this.$refs);
        this.$refs.loginFormRef.resetFields();
      },
      login(){
          this.$refs.loginFormRef.validate(async vali=>{
              if(!vali)return;
              const {data: res} =await this.$http.post("login",this.loginForm);
                if(res.meta.msg!=="登录成功")return this.$message.error('登录失败')
                this.$message.success('成功登录')
                //1.登录成功后 token 保存到客户端sessionStorage中
                //  1.1项目中出除了登录之外其他的API接口,必须在登录时候才能访问
                //  1.2token只应在当前网站中打开期间生效,所以将token 保存在sessionStorage中
                console.log(res);
                window.sessionStorage.setItem('token',res.data.token)
                //2.通过编程式导航跳转到后台主页,路由地址是/home
                this.$router.push("/home");
          });
      }
  },
};
</script>
<style lang="less" scoped>
.login_container {
  background-color: #2b4b6b;
  height: 100%;
}
.login_box {
  width: 450px;
  height: 350px;
  background-color: #fff;
  border-radius: 3px; //圆角边框
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  .avatar_box {
    height: 130px;
    width: 130px;
    border: 1px solid #eee;
    border-radius: 50%;
    padding: 10px;
    box-shadow: 0 0 10px #ddd;
    position: absolute;
    left: 50%;
    transform: translate(-50%, -50%);
    background-color: #fff;
    img {
      width: 100%;
      height: 100%;
      border-radius: 50%;
      background-color: #eee;
    }
  }
}
.login_form {
  position: absolute;
  bottom: 0;
  width: 100%;
  padding: 0 20px;
  box-sizing: border-box;
}
.btns {
  display: flex;
  justify-content: flex-end;
}
</style>

